Uptime JSON Metadata plugin

Adds a custom JSON metadata field to Uptime (https://github.com/fzaninotto/uptime) Check model.

Install the plugin via npm:

$ npm install uptime-json-meta

Enable it in config/[env].yaml :

plugins:
  - uptime-json-meta

Customize the options in config/[env].yaml :

jsonMetaPlugin:
  path: [customFieldName]